Producing phonographic records.



I. KITSEE. PRODUCING PHONOGR APHIG RECORDS.

APPLICATION FILED M316, 1908.

903,198. Patented Nov. 10,1908.

gmwr

IBIDOR KITSEE, OF PHILADELPHIA, PENNSYLVANIA.

PRODUCING BHON'OGRAPEO RECORDS.

Specification of Letters Patent.

Patented Nov. 10, 1908.

Application filed larch 6, 1908. Burial Ho. 419,578.

To all whom it may concern:

Be it known that I, Ismon Krrsnn, a citizen of the .United States,residing at Philadelphia, in the county of- Philadelphia and State of.Pennsylvania, have invented certain new and useful Improvements in Producing Phonographic Records, of whichthe following is a specificati n.1,

My invention relates 0 an improvement in producing phonographic records.Its object 'is to produce such records in a simple and efiicient manner.1

In practicin this, my invention, I. prefer to make use 0 a vibratingdiaphragm with the aid of which a non-conduct' .material is deposited ona conducting sur ace in accordance with the vibrations of said diaphragmproduced by the generated sound plan view in waves.

In the drawing i re 1 is a conventional form ifiiistrating theconducting material on which the lines of record are later on to bemarked. Fig. 2 is a similar view of the same material with the soundrecord marked thereon. Fig. 3 is a similar view of the conductingmaterial having marked thereon the lines of record and provided with theelectro-plate' as later on to be more fully explained. Fig. 4 is a crosssection' of a recording mechanism pro vided with the referred means ofdepositing the materiaPon the conducting plate.

1 is the conducting support; 2 the lines of record and 3 theelectro-deposit on said ate. p In Fi 4, 5 represents the mouth i ec'e; 6the diap ragm; 7 the stylus attache to the diaphragm. This stylus ishere partially sup orted by the movable lever 8 attached to t e bar 9held in position here by the support 10. 11 is the reservoir conta" thenon-conducting fluid 12. 13 is the fluid outlet here shown as connectedwith the res-- ervoir with the interposition of the flexible tube 14. 15are the means to stop the flow of the fluid.

The modus operandi of practicing this,

my invention, 13 as follows :A metallic face wit vibrating dia hragm ofa phono raphiq transmitter. s stated above, I pre er'that this materialshould be deposited without necessitating the actual contact of thestylus with the plate whereon such material has to be deposited. I,therefore, produce a liq uid or fluid in a. manner so that the sameshould be non-conducting. .I have tried different fluids and found thateither a solution of shellac in alcohol, or a solution of rosin inhydrocarbon will answer for all, practical purposes.

Lprefer that the stylus, which is supported by the vibrating diaphram'of a recorder, should be provided with an orifice and should .be inoperative relation with a reservoir containing the necessary liquid orfluid. Beneath this orifice, I place the metallic plate adapted toreceive the record. The non-conducting fluid or liquid should issue fromthe reservoir .in a very thin stream; and as the stylus with its orificehas to vibrate in accordance with the vibrations of the diaphragmproper, it is obvious that the liquid or.fl1i1d will be deposited on thesolid surface in a manner so as to reproduce these vibrations. Afterhaving deposited thereon the required recording lines, the conductingplate is subjected to the process of electroplating. As againstatedabove, I prefer to use a copper plate and I also prefer to electro-platethe same with an additional copper. The mode ofproduci suchelectro-deposition is well known. he plate is made the cathode in anelectrolytic apparatus in which the electrolyte consists of a solutionof sulfate of copper. This anode is a copper in convenient form. When aplate, prepared as above, is subjected insuch apparatus to the action ofthe current, the copper will be deposited only on such parts of thesurface of this plate as are conducting, but such partsas are madenonconductin will be left free from the deposit; an as the lines ofrecord are nonconducting, it is obvious that these lines will remainfree from the de sit. A plate therefore, having the lines 0 recordmarked on its surface with a non-conducting material will, after it istaken from the electrolytic ap 'aratus, have all parts of its surh theexception of such parts which re resent the lines of record, raised. Theheight between the lines of record and the other parts of the late will,therefore, be differentiated and t 0 lines of record themselves willlook as being in intaglio or depressed as to the other partsof thesurface. From such a plate, copies can then be made in accordance withany of the well known methods.

I have illustrated and described one apparatus with the aid of which thelines of.

I cordance with the vibrations of a diaphragm actuated by said sound wavs, and causing to be dilferentiat'ed the height of the lines of recordand the height of the remaining parts of the surface of the conductingmaterial through the process of electro-deposition.

2. In the production of sound records, the method which consists infirst recording the sound waves upon a suitable surface, andelectro-plating upon the parts of the surface upon which no record hasbeen made.

3. As a new article of; manufacture, a phonographic record comprising aconducting support, lines of record thereon and a metallic deposit onall' parts of the surface of said support with the exception of thoseparts which are covered by the lines of record.

In testimony whereof I aflix my signature in presence of two witnesses.

ISIDOR KITSEE.

WVitnesses:

EDITH R. STILLEY, MARY 0. SMITH.

